older 912 ul heating up

[oldfox]

Ok guys here is the update have about 20 hours on the old bird have 168 main jets in carb EGTs at 1550 F at max, coolant temp at 230 F max , cylinder head temp 260 F runs great. Still not sure why I had to open up jets to get to right temps?? Here are some pic of the plugs, one from each side what do you guys think of color of plugs . Still looking for cause